Core-separator.



PATENTED APR. 9, 1907.v

J. P. MALLETT.

GORE SEPARATOR.

APPLICATION FILED we. 1, 1905.

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e M a @M Mp UNITED STATES PATENT OFFICE JOHN P. MALLETT, OF MADISON,WISCONSIN, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEWYORK.

ooRE-sEPARAToRQ Specification of Letters Patent.

Patented April 9, 1907.

To all 2071,0712, it may concern.-

Be it known that I, J 01m P. h iumrc'rr, a citizen of the United States,residing at Madison, county of Dane, State of Wisconsin, have inventedcertain new and useful Improvements in CO1G*S6P&1&COI'S, of which thefollowing is a specification.

My present invention has for its object improvements in the constructionand arrangement of the spacers or separators used for formingventilating-(jlucts in electrical ap aratus, particularly adapted foruse with laminated magnetic cores for the purpose of formingventilating-ducts by separating sec tions of the laminated cores, andgenerally for supporting the toothed portions of laminated cores.

The various features of novelty which characterize my invention arepointed out with particularity in the claims annexed to and forming apart of this specification.

For a better umlerstamling of my invention, however, reference may behad to the accompanying drawings and. descriptive matter, in which Ihave illustrated. and described one of the forms in which my inventionmay be embodied.

Of the drawings, Figure 1 is a sectional elevation of a portion of adynamo-electric machine. Fig. 2 is a perspective view of my space-blockor separator with a portion of the laminato which. it is attached shown.in dotted lines, and Fig. is an elevation of a portion of a lamina withattached separator or space-block.

in the form of my invention. disclosed T have shown it employed in thearmature of a direct-current dynamo-electric machine.

Referring to the drawings, 1 represents the shaft of a dynamo-electricmachine to which is secured in any suitable manner, as by means of cones2, a spider 3, which supports in any well-known manner the laminatedarmature-core 4. As shown, the armaturecore comprises sections 5, formedof laminae 6 of magnetic material which are separated from each other byspacers, separators, or fingers 7 to form radially-cxtendingventilating-passages 8, each of said passages being formed by adjacentsections 5 and adjacent separators 7.

The spacers or separators which I employ are in the form of troughsU-shaped in crosssection, formed out of sheet metal. From each of thetwosimilar long edges of each trough-shaped separator 7 extends aprojection 9. The lamina 6 of each section 5, to which these spacers areattached, is formed with a set of rectangular openings 10, which aresymmetrically placed, preferably one below the base of each core-tooth11. The projections 9 of each separator pass through the correspondingopening 10 in the lamina 6, to which it is attached. These PIOjGOtiODS 9are upset, as shown in Fig. 2, and form a means for rigidly securing theseparator to the lamina. Ordinarily the projections 9 are upset afterbeing inserted. through the corresponding openings 1.0. The parts arepreferably so proportioned that the sides of the separator require aslight amount of compression to allow of the entrance of the projectionsof the spacer into the opening 10, in consequence of which the spacersare held by friction in the laminae after having been inse rted prior tobeing upset. This facilitates the assembling of the spacers.

As is clearly shown in Fig. 3, the spacers extend from the inner edge ofthe core to a point at or near the outer end of the corresponding teeth11. When the core is assembled, ventilating-passages 8 are not onlyformed between adjacent sections in the spaces between spacers, but aventilatingpassage 12 is formed within each. spacer which extends fromthe inner surface of the core to the end of the corresponding coretooth.The passage of air through the passages 12 assists considerably inconveying heat away from the armature-conductors 13, which are placed inthe slots between. adj acent core-teeth 1]. The structure of the spacersor fingers 7 and 15 is such that when the core is compressed between theend members 14 by bolts 18 there is no tendency of the spacers to turnat an angle to the lamina to which they are secured.

It will of course be understood that the aircurrents through theventilatingq')assages 8 and 12 when the armature is rotated. not onlycool the armature, but cool the surrounding pole-pieces 16 and windings17 therefor.

Between each end member 14 and the adj acent end of the core may beinserted a set of spacers or fingers 15, which may be similar inconstruction and the 111%].11161 of their connection to the end laminaeof the core to the spacers or separators 7, though ordinarily thespacers 15 do not extend to the inner surtace ot the core. The spacersor lingers l5 serve to support the toothed portions of the end lamimeand prevent their distortion. Means may he provided, it necessary ordesirahle, tor causing ventilating air-currents to flow through thelingers 15 and through the spaces ltetween the ends of the core and theadjacent end memhers.

In the construction illustrated in the drawings I have shown the innerends of fingers or separators 15 as entering into annularventilating-channels ll), formed in the end memhers. Lateral passages20, passing il11(')U l1 the end memlters l4, communicate with toochannel 19. The outward llow ot air from the channels 19 serves to coolthe end connections of the windings in a manner well known to thoseskilled in the art.

The construction which I have hereinhetore descrilted and illustrated issimple and comparativel inexpensiveio manufacture and has lteen found tohe relialale hv commercial use on a large scale.

hat I claim as new, and desire to secure h v Letters Patent of the Inited States, is

, 1. In comhination, a laminated core. (iiv ded into sections, andseparators lt-etween the sections consisting ol pieces of sheet metallent into the term ot troughs open at each end.

2. In a dynamo-electric machine. an annular core, tormed ot laminatedmagnetic material divided into sect'ons, and radii. 7-extending spacersor separators placed hetween the sections and hearing against thelaminae, each spacer having a vcntilating-passage formed in it.

3. In a :l inamo-electric machine, an annular core tormed ol' laminadivided into sec tions, and a spacer or separator located lte tween thesections extending from a point adjacent the inner edge of the core to apoint adjacent the peripher of the core, said spacer having aventilatingmssage formed in it.

t. In a dynamo-electric machine, an annular core tormed of laminatedmaterial divided into sections and having coinluctor-receiving slotsseparated h v teeth formed at its peripher -i, and separators or spacershetween the sections extending from a point adjacent the inner surt'aceof the core to the peripheries ol the teeth, said separators havingventilating-passages formed in them.

5. In comhination, a core-hnnina lormed with an opening in it, aseparator memher, and means for securing it tosaid lamina. com prisingtwo projections side h side each of which enters said opening.

6. In comhination, a core-lamina formed with an opening in it, aseparator memlzer, and means for securing it to said lamina comprisingtwo projections side h side each of which enters said opening and isupset.

7. In com iiination, a corelamina formed with an opening in it, aseparator 111(l1llitl', and means for securing it to said laminacomprising two projections side l1 side each entering said opening, theparts heing so proportioned that the projections must he sprung togetherto allow o't their insert ion in said opening.

8. In comlaination, a lamina, and lingers secured thereto, each lingerlteing in the l'orm ot a trough open at each end, the top edges of whichhear against said lamina.

9. ln comhination, a core-lamina; and a pluralit ot lingers securedthereto, each tinger l;-eing in the form oi a trmtgh-shaped piece otmetal U-shaped in cross section with 'he ends of the U hearing againstsaid lamina, lio'l'h ends oi each trough lieing open.

In witness whereot I have hereunto set in hand this 28th da t ot' July,1905.

JOHN P. MALLEVI.

itnesses:

H. L. Moinns, S. E. KENDALL.

